Well pump



Patented Mar. 9, 192 6.

- UNITED STATES .rorm A. zunnni, or nos enemas, cnmronnm.

- WELL rims.

Application filed January 25, 1923. Serial No. 614,776.

' To all whom it may concern:

Be it known that I, JOHN A. ZUBLIN, a

citizen of the Republic of Switzerland, re-

siding at Los Angeles, in the count of Los Angeles and State of California, ave in- ,vented anew and useful Well Pump, of

which the following is a, specification.

This invention relates to Well pumps and,

is particularly directed to animproved pump unit structure adapted for operation in a working barrel or in a pump tubing.

It isan-object of the inventionto provide a simplified structure of few parts,

which is designed to reduce wear to a mini- 1 mum, and at the same time to provide a structure which can be cheaply and easily -manufactured and can be conveniently andeasily assembled or disassembled in the field. Another object is to provide a pump in which the pumped fluidis directed with a washing action against the tubing wall on opposite sides of the pump packing to main- I tain said wall clean off reign substances liable to injure the packing. A further object is to provide a pump unit which may be used and operated for the purposes set forth in my copending application. Serial No. 594,194 m which a plurality of pump units operate in a pump tubingat spaced intervalsand are adapted to accommodate themselves to internal diameter variations of difierent makes and.

weights of standard pump tubing.

Another object is to provide a pump unlt in which the sucker-rod extends throu h the pump. plunger and is ided therein,

the sucker rod having a va ve element 60 operating'fwith the plunger to control the passage, f fluid through the plunger, and

being adapted for an independent 1n1t1al movement effecting a valve operation and for a subsequent movement translating theplunger.

Varlous other objects and advantages will be more fully apparent from the following description of the aceom'panyin drawings,

' which form a part of thisdisc osure, and.

which illustrate a preferred form of embodiment oi the invention.

Of the drawings 5,

" Figure 1 is a vertical section through a well tubing and a pump'unit of the present invention, the pum mechanism being shown in closed position or a liftingstroke;

Figure 2 is a similar view showing the pump plunger 3 surrounds thesucker rod'secpump mechanism in opened position during a down stroke. v

Figure 3 is a plan-section on line 33'of Figure 1.

Figure 4 is a vertical'section illiistrating a slightly modified form of pump unit. In the drawings, 1 designates a pump tubing in which the pump unit reciprocates, and 2 designates a special sucker ro'd section as part of the sucker rod line. A tubular tion 2, forming therewith an annular fluid passage 4 and having a medial ring groove 5 to receive a packing ring 6. The opposite 7 ends of the plunger are of reduced diameter and with the tubing wall form annular fluid passages 7 and 8, the upper end por tion of the plunger having portsf9 estab lishing communication between the fluid passage 7 and the bore 4 of the plunger, and the lower end portion "of the plunger having similar ports 10 establishing communication between the fluid passage 8 and .the bore 4 of the plunger. v

The bore of the plunger is enlargedat itslower end and immediately above the ports 10' is. formed to provide anannular valve seat 11. The sucker rod section 2 has a cone valve element 12 at its lower end portion, which has a sliding fit in the enarged lower end of the plunger bore'and is adaptedjor cooperation with the valve seat 11 to control the central fluid passage 4 of the plunger. The rod 'section 2 1s further provided with a guide collar 13 hav- 1ng-a sliding fit' in the upper end of the bore of the "pllmger above the ports 9, the upper end of said rod section having a screw-threaded pin 14 to engage in the upper adjacent standard sucker rod section 15, a stop abutment 16,. in the formjof a washer, being clamped between the rod sections 2 and15.

The outer periphery of the plunger "from the medial grooved portion to the reduced end portions is shownas tapered to permit an easy insertion of the pump unit into the pump tubing. v Y g This construction provides a? ump unit pump plunger and in which the plunger bore forms an annular longitudinal fluid" passage 4 communicating through the ports in which the suckerrod extends t rough the 5 1 the 50 tact with the tubingwall.

66 .tive to compensate for wear.'

ment 12 and the washer 16 carried by the sucker rod serving as opposed .abutments relatively spaced to permit an initial inthe initial upward movement ofthe rod the valve 12 will engage the valve seat 11 of the plunger to close the plunger fluid passage 4 (see Figure 1) and will. then translate the i0 pump plunger 3 upwards in a pumping stroke upon a continued upward movement of the rod, a reverse movement of, the, rod causing the valve 12 to open and the abutment washer 16 to engage the upper end of plunger (see Figure 2) whereupon a contlnued downward translation of the rod will effect a return stroke of the plun er.

During such downwardtranslation the plunger the fluid will flow'as indicated b the several arrows, it being noted that sub 1 flow is directed through the passages 7 and 8 and the ports 9 and 10 so as to have a direct flushing or scouring action upon the tubing walls on opposite? sides of the plunger packing.

The pump unit of the present-invention, while well adapted for operation in a working barrel which is usually machined to standard size, is also adapted for operation in pump tubing, either singly or in multiple,

arranged in the manner illustrated and described in my copending application above referred to. p

When used in a working barrel, as shown in Figure 4, the pump plunger 3 'will have a close working fit in the barrel 1, but when working in pump tubing,'as shown in Figures 1 to 3, it is not intended that the plunger 3 shall closely fit the tubing on ac- 40 count of the relatively wide variationsin the internal diameter of standard well tub ing of different makes and weights. To provide pum units which will operate in such standar tubings it is intended that such units have plungers of a diameter 'which is sli htly less than the internal diameter of tie heaviest tubing of a given standard size and to rovide an expansible plunger packing whic will expand to con- V This is further desirable for the reason that the ends of tubing sections are sometimes burredor the torted to an, extent which would? render it diflicult, if not impossible, to insert a noncollapsible pump unit into the tubing.

In this manner I provide a pump unit v aiiipted forefiicient o eration in standard v 'w can beinsertedinf undersized tubing as well as in oversized (tubing, theexpansible packing beinglefiec tive inieither' case for a close wor againste thejtubing walls, the efipan yeflec l tubing andwhic fit action of the ring being continu and the abutment Various types of expanding packing rings may be employed in a pump unit of this .type, the specific type shown herein, conshown in the\drawings consists of a split cylin'drical member having a medial portion 17 of substantial thickness and end portions which are turned down so as to .be considerably thinner. To obtain the greatest degree of resiliency in a ring of this form it is longitudinally slit inwardly with each alternate slit 18 extending from opposite ends inwardly through the thick medial portion and ending at the thinner end portions (see Figure 2). This provides a ring having a relatively thick central packing portion and which is as resilient as the several thinner end portions 19.

In-a pump of the above described character the positive action ofthe valve produces a uniform pumping and insures a struction as to be practically indestructible,

and while such-construction is well adapted to fulfill the objects primarily stated it is to be understood that the invention is notto be limited to the form 'of embodiment herein disclosed, for' it is susceptible of embodiment in various other forms, all coming within the scope of'the following claims. 1 I claim:

1. A well pump unit including a tubular plunger forming a longitudinal fluid passage and having a valve seat, a sucker rod com- "uniform wearing in of the valve, these results i prising a specialsection havin a valve element and a guide collar, bo interfitting within reduced ends of the plun r to maintain the rod and plunger in re ative axial alignment, and an abutment near the up er en of said special section, the rod having an" initial inde endent movement relative to the plunger w erebgmduring an up. stroke the yalveelementt engages the valve seat to close' the fluid passage and then I translatesthe' plunger, and durin a down walls of the tubing dented or-otherwise dis-- stroke the valve first Opens the flui passa e plunger.

.- 2. A wel'l pump unit including a tubu e.-

plunger forming a longitudinal fluid passage with lateral openings near the ends thereof and ha'vin its bore enlarged at one end to define av ve' seat,'and a sucker rod extend-j ing'throughand ided in said plunger bore then translates it e and having a va vefelement 'slidablein the enlarged portion; of the bore past the'lateral- 0 mn theretovand'adapted to cooperate valve, seat said fluid pendent of the passage, said rod having an abutment and adapted to have an initial movement indeplunger, whereby upon an up stroke of the sucker rod the valve will first close the fluid passage and then translate the plunger 'in a pumping stroke, and

- upon a down stroke of therod the valve will and guided by enlarged portions interfitting within reduced ends of said plunger, said plunger having lateral openings and the rod having an initial movement relative to the plunger and formed to close said fluid passage during an initial independent up stroke of the rod and then translate the plunger in a pumping stroke, and to open said fluid passage during an initial independent down stroke of therod and then return the plunger in a return stroke.

e 4. A well pump unit adapted for operation either singly or in multiple and including: a plunger. open at both ends and reduced at both ends, each reduced end being provided with lateral apertures; and a relative- 1y movable sucker rod section provided with means for closing the lower end of said plunger and with guide means interfitting within said reduced ends.

' Signed at Los Angeles, California, this- 17th dayof January, 1923.

' i JOHN AQ ZUBLIN. 

